Myler, Atkins and Grix will stay at the club until November 2015 and Blythe has committed to the Wolves until 2014.

Wales international Williams, who made his debut last season, will remain with the side until November 2012.

Coach Tony Smith led his team to their first Leaders Shield since the creation of Super League in 1996, and decided to extend the deals of many of the club's British players who played their part in this season's success.

Half-back Myler, 21, joined the Wolves from Salford back in 2010 and has made 51 appearances for the side, scoring 38 tries.

Atkins, a centre, moved from Super League rivals Wakefield in 2010 and he scored 26 tries last season, while the versatile Grix has been at the club for eight years making his debut in 2006.

Williams spent the early stages of last season year on loan at Crusaders, and has made 14 Super League appearances for the Wolves.

Blythe, a second-row forward, has progressed through the club's youth system making his debut in 2007 with 42 to his name to date.